Hiyama Cross-Coupling of Chloro-, Fluoro-, and Methoxypyridyltrimethylsilanes: Room-Temperature Novel Access to Functional Bi(het)aryl
作者:Philippe Pierrat、Philippe Gros、Yves Fort
DOI:10.1021/ol047482u
日期:2005.2.1
pyridyltrimethylsilanes allowed us to perform efficient Hiyama cross-coupling with various (het)arylhalides. The reactions proceeded smoothly at room temperature leading to the corresponding functional bis(het)aryl in fair to excellent yields. The presence of pyridine nitrogen alpha to the trimethylsilyl group was requisite to achieve the cross-coupling. [Reaction: see text]
Review on the metallation of π -deficient heteroaromatic compounds
作者:Francis Marsais、Guy Queguiner
DOI:10.1016/s0040-4020(01)91919-2
日期:1983.1
Metallation of π-deficient heterocyclic compounds is first reviewed, which shows the important recent developments in this research area. A particular aspect of this reaction is then given with the study of the 3-fluoropyridine metallation regioselectivity.
3-fluoropyridine were converted into all possible regioisomers of the corresponding carboxylic acids by passing through the corresponding organometallic intermediates. As an attempt to generalize the findings reveals, a restricted set of principles and methods suffices to cope with all std. scenarios. The most valuable and versatile tools for the regiochem. exhaustivefunctionalization of a great variety